<!doctype html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">

    <title>Document</title>
</head>
<body>
        <form action="/login" method="post">
            <input type="hidden" name="backUrl" th:value = "${param.backUrl}">
            username: <input type="text" name="username">
            password: <input type="text" name="password">
            <button type="submit">登录</button>
        </form>
</body>
</html>